One-side sedimentation three-dimensional circulation integrated oxidation ditch equipment and operation method

Abstract

The invention discloses unilateral precipitation three-dimensional circulation integrated oxidation ditch equipment. The unilateral precipitation three-dimensional circulation integrated oxidation ditch equipment comprises a unilateral precipitation solid-liquid separator and a three-dimensional circulation oxidation ditch, wherein the solid-liquid separator and the three-dimensional circulation oxidation ditch are separated by the side wall of the solid-liquid separator and the side wall of the three-dimensional circulation oxidation ditch and share one bottom; a clearance is reserved between the side wall of the solid-liquid separator and the side wall of the three-dimensional circulation oxidation ditch so as to form a slit; gaps are reserved between the side wall of the solid-liquid separator and the bottom and between the side wall of the three-dimensional circulation oxidation ditch and the bottom, so that the solid-liquid separator is communicated with the three-dimensional circulation oxidation ditch; an underwater impeller is arranged at the lower end of the side wall of the three-dimensional circulation oxidation ditch; and an underwater mud scraper is arranged in the solid-liquid separator. The unilateral precipitation three-dimensional circulation integrated oxidation ditch equipment occupies a small area, is little in investment, simple to operate and maintain, good in effluent quality and particularly suitable for large-scale domestic wastewater treatment; the sludge recycling is realized jointly by using the mud scraper, the underwater impeller and the slit between the solid-liquid separator and the oxidation ditch; and the intensity and efficiency of sludge recycling are improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment by biological methods, and mainly relates to a three-dimensional circulation integrated oxidation ditch equipment suitable for sewage treatment and an operation method thereof. Background technique [0002] Oxidation ditch technology can flexibly change the ditch type according to different needs, and can run single ditch or multiple ditches simultaneously, providing sufficient space for the design of oxidation ditch. The operation is relatively energy-saving, impact-resistant, and has a good removal effect on organic matter, total nitrogen, ammonia nitrogen and other pollutants. It has been popularized and applied in many countries, but the large area has always been an insurmountable shortcoming of the oxidation ditch. [0003] In view of the shortcomings of the large area of ​​the oxidation ditch, the integrated oxidation ditch (Integral oxidation Ditch referred to as I.O.D) was develo...

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Problems solved by technology

[0004] However, the above-mentioned patented equipment is subject to certain limitations in the treatment of large-flow sewage. If the return of sludge is not sufficient and timely, the channel between the oxidation ditch and the solid-liquid separator will be blocked by sludge, and gas will be produced after anaerobic digestion. Floating, after the large pieces of floating sludge are broken, their settling performance is poor, and they enter the outlet with the water flow, affecting the quality of the effluent

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